Apparatus and method for measuring range of motion of an articul

Details Apparatus and method for measuring range of motion of an articul Apparatus and method for measuring range of motion of an articul

1992-12-17

1993-10-19

Hindenburg, Max

Surgery

Truss

Pad

33755, A61B 510

Patent

active

052536556

ABSTRACT:
An apparatus for measuring the angle A of flexure of a joint between longitudinal axes of adjacent, jointed body parts includes first and second coupling mechanisms for fixture respectively to the first and second body parts. Each of the coupling mechanisms is fixed to its respective body part at a specified distance from the joint being measured. The apparatus further includes a measuring device for generating a signal representative of the direct, linear distance between the coupling mechanisms as the joint passes through a range of motion. A computing device operates in response to the signal generated by the measuring device to determine the angle A in accordance with the law of cosines. An advantage of the apparatus is that it is significantly tolerant of improper placement of the coupling mechanisms.

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